skip to content
Search
Search U.S. government technical reports digitized or harvested by
TRAIL
.
Keyword Search
Enter your search term(s):
[advanced search]
2 results returned
Browse TRAIL Inventories
(opens in new tab)
Search results
Prediction of penetration rate for percussive drilling
Tunnel boring technology :disk cutter experiments in sedimentary and metamorphic rocks
Refine your search results
Published Year
1970-1979 (2) *
Subject
Boring (1)
Boring machinery (1)
Mining machinery (1)
Percussion drilling (1)
Author
Bruce, William E. (2) *
Larson, David A. (1)
Morrell, Roger J. (1)
Selim, A. Aly. (1)